Lots of small changes

Please look at comments in code for changes that have to be reviewed. The comments are marked as TODO.

bilder/dynamic_array_aufwand.tex

@@ -13,6 +13,6 @@
       (11,1) (12,1) (13,1) (14,1) (15,1) (16,1) (17,1) (18,1)};
   \addplot+[ybar] coordinates {(1,0) (2,1) (3,2) (4,0) (5,4) (6,0) (7,0) (8,0) (9,8) (10,0)
       (11,0) (12,0) (13,0) (14,0) (15,0) (16,0) (17,16) (18,0)};
-      \legend{\strut $n$ erweitern$, \strut $n_\text{cap}$ erweitern$}
+      \legend{\strut $n$ erweitern, \strut $n_{\text{cap}}$ erweitern}
   \end{axis}
 \end{tikzpicture}